Production planning system and production planning method

Abstract

To develop a production plan that reduces an environmental load such as power consumption while adhering to a required deadline or the like even when various type mixed production is performed.SOLUTION: A production planning system comprises a calculation unit and a storage unit. The storage unit holds production planning information. The production planning information includes a model of each product to be produced, a required deadline for each process of each product, and an expected completion timing of each process of each product. The calculation unit generates an operation plan for a facility that performs each process for each product, based on the production planning information, so that the required deadline for each process for each product is met, and changes the operation plan based on an index for indicating a reduction in power consumption of the facility so that the required deadline for each process of each product is met and a period in which the facility is not in operation is included.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a technology for supporting the creation of production plans in factories that manufacture products. [Background technology]

[0002] Background art includes Japanese Patent Application Laid-Open No. 2003-32892 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2020-162410 (Patent Document 2).

[0003] Patent Document 1 states that "the system includes a work process generation means for generating work processes, a reliability system planning means for planning a reliability system that ensures system reliability, an equipment shutdown plan evaluation means for evaluating an equipment shutdown plan determined by the work processes generated by the work process generation means and the reliability system planned by the reliability system planning means, and an equipment shutdown plan storage means for storing the equipment shutdown plan with the best evaluation."

[0004] Patent document 2 describes a method for formulating a mixed integer programming (MIP) in a power generation planning system by incorporating a decision diagram representing the feasible actions of a generator unit into the MIP formulation, and the result of the incorporation tightens the set of feasible actions of the generator by knowing the state and on / off time of the generator in each period. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-32892 [Patent Document 2] Japanese Patent Publication No. 2020-162410 Summary of the Invention [Problem to be solved by the invention]

[0006] Control panels and other social infrastructure system products are produced in a high-mix, mixed-product production process. In this process, many different types of products are produced and are changed frequently. Traditionally, efforts have been made to optimize plans for highly efficient high-mix, mixed-product production, such as by leveling out workloads. However, in recent years, with growing environmental awareness, it has become important to develop production plans that reduce environmental impacts such as power consumption and CO2 emissions.

[0007] One method for reducing power consumption in a production process is to stop equipment according to a production plan, as described in Patent Documents 1 and 2. However, in high-mix, low-volume production where the types and production volumes of products to be produced change frequently, the following issues must be addressed in order to increase the effectiveness of reducing power consumption.

[0008] First, medium-term schedules are generally created by piling up loads using a fixed manufacturing lead time. However, in the case of mixed-product production, the type of product being introduced is frequently changed, and compared to when the type being introduced is changed, the setup time can be reduced when the same type is introduced continuously, resulting in a shorter actual manufacturing lead time. If the manufacturing lead time used to create a production plan is fixed to a value that assumes a change in type, actual production may be completed earlier than planned due to the continuous introduction of the same type. This creates room for creating a production plan that reduces power consumption, etc., by stopping equipment during the excess period in the manufacturing lead time. However, in the past, setup times that correspond to such conditions were not sufficiently taken into account.

[0009] Secondly, in order to reduce power consumption, etc., it is expected that production plans that shut down equipment on a daily basis will reduce power consumption, etc., but the conventional production planning method that involves leveling the workload did not take into consideration the creation of such production plans. [Means for solving the problem]

[0010] In order to solve at least one of the above problems, the present inventionOne aspect of is a production planning system comprising a calculation unit and a storage unit, wherein the storage unit holds production plan information, the production plan information including a model of each product to be produced, a required deadline for each process of each product, and a scheduled completion time for each process of each product, and the calculation unit generates an operation plan for equipment that performs each process of each product based on the production plan information so that the required deadline for each process of each product is met, and Based on uptime Based on the index, the required deadline for each process of each product is met and the equipment is not in operation. Time gets longer The operation plan is changed as follows. [Effects of the Invention]

[0011] According to one aspect of the present invention, even in the case of a multi-item mixed production, it is possible to formulate a production plan that reduces the environmental impact, such as power consumption, while adhering to required deadlines, etc. Problems, configurations, and effects other than those described above will become clear from the following description of the embodiment. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a block diagram of a configuration of a production planning system according to an embodiment of the present invention. [Figure 2] FIG. 2 is an explanatory diagram of a production plan held by the production planning system according to the embodiment of the present invention. [Figure 3] FIG. 3 is an explanatory diagram of fluctuation information of working hours held by the production planning system according to the embodiment of the present invention. [Figure 4] FIG. 10 is an explanatory diagram of corrected scheduled completion date and buffer information held by the production planning system according to the embodiment of the present invention. [Figure 5] FIG. 10 is an explanatory diagram of operation plan candidates for which the amount of work is zero, held by the production planning system according to the embodiment of the present invention. [Figure 6] 1 is a flowchart of a process executed by a production planning system according to an embodiment of the present invention. [Figure 7] FIG. 10 is an explanatory diagram of an output screen displayed by the production planning system according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0014] FIG. 1 is a block diagram showing the configuration of a production planning system according to an embodiment of the present invention.

[0015] The production planning system 100 is a device including a PC (Personal Computer) such as a server or a terminal, and software installed on the PC, and is equipped with an input / output unit 101, a storage unit 102, and a calculation unit 103. The production planning system 100 is connected to systems such as a design system 105 and a work instruction device 106 via a network 104.

[0016] The input / output unit 101 is used to acquire data necessary for processing by the calculation unit 103 and display the processing results, and is configured to include, for example, input devices such as a keyboard and mouse, a communication device for communicating with the outside, a recording / playback device for disk-type storage media, and an output device such as an LCD monitor.

[0017] The storage unit 102 includes input information 107 used in the processing of the calculation unit 103 and output information 108 for storing the processing results, and is configured with a storage device such as an HDD (hard disk drive) or an SSD (solid state drive), and memory.

[0018] The input information 107 includes a production plan 111, work progress 112, work time fluctuation information 113, model unit process information 114, and setup conditions 115. The output information 108 includes stagnation information for each process 121, corrected scheduled completion date / buffer information 122, operation plan candidates 123 for which the amount of work is zero, operating equipment information 124, input simulation results 125, and an adjusted production plan 126. These pieces of information will be described later.

[0019] The calculation unit 103 has a memory unit 130 and a calculation processing unit 131. The memory unit 130 is used to temporarily store data acquired from the input / output unit 101 and input information 107 of the storage unit 102, as well as results of processing by the calculation processing unit 131.

[0020] The calculation processing unit 131 is composed of a data acquisition unit 132, a manufacturing lead time (LT) correction unit 133, an operation plan planning unit 134, an input date and personnel allocation adjustment unit 135, and a display control unit 136. The processing executed by each of the above units will be described later.

[0021] Next, the input information 107 will be described.

[0022] FIG. 2 is an explanatory diagram of the production plan 111 held by the production planning system 100 according to the embodiment of the present invention.

[0023] The production plan 111 is information for managing the production plan of a product, and is composed of, for example, information on a process 201, a model 202, a required deadline 203, a scheduled completion date 204, and a buffer 205. The process 201 is information for identifying the process for producing a product. The model 202 is information for identifying the product to be produced. The required deadline 203 indicates the deadline by which the process for the product is required to be completed. The scheduled completion date 204 indicates the scheduled date by which the process for the product is completed in the current production plan. The buffer 205 indicates the difference between the required deadline 203 and the scheduled completion date 204.

[0024] FIG. 2 shows, as an example, a production plan 111 for process "1-1" of a product of type "A." For example, if the final product is a control panel and the product of type "A" is a printed circuit board that constitutes the control panel, the required deadline for process "1-1" of the product of type "A" that constitutes a certain control panel is "December 1," and the planned completion date for that process of that product in the current production plan is "November 29," meaning there is a difference of two days (i.e., a margin) between the planned completion date and the required deadline. Also, the required deadline for process "1-1" of the product of type "A" that constitutes another control panel is "December 3," and the planned completion date for that process of that product in the current production plan is "November 30," meaning there is a difference of three days between the planned completion date and the required deadline. Furthermore, the required deadline for process "1-1" of the product of the model "A" that constitutes yet another control panel is "December 2nd," and the scheduled completion date for that process of that product in the current production plan is "November 29th," meaning there is a difference of three days between the scheduled completion date and the required deadline.

[0025] The work progress 112 is information indicating the actual progress of work in each process, and may include, for example, information indicating the amount of backlog of products in each process. If the amount of backlog is large, the completion of each process for each product may be delayed from the scheduled completion date of the production plan.

[0026] The work time variation information 113 is information that indicates variations in the manufacturing lead time of each process for each product. The manufacturing lead time of each process for each product may be set based on, for example, past manufacturing results, but in reality, there may be cases where completion is delayed (i.e., the buffer becomes shorter) due to the influence of the amount of stagnation described above, or where completion is accelerated (i.e., the buffer becomes longer) due to the influence of a reduction in setup time, which will be described later. The work time variation information 113 includes the manufacturing lead time corrected according to the amount of stagnation, setup time, etc.

[0027] FIG. 3 is an explanatory diagram of the work time fluctuation information 113 held by the production planning system 100 according to the embodiment of the present invention.

[0028] The work time fluctuation information 113 shown in Figure 3 is composed of information on entry date 301, process 302, equipment 303, model 304, manufacturing lead time (master) 305, and manufacturing lead time (correction) 306. The entry date 301 indicates the date on which the product is entered into the process. The process 302 is information that identifies the process. The equipment 303 is information that identifies the equipment to which the process is assigned (i.e., the equipment on which the work of the process is performed). The model 304 is information that identifies the model of the product to be entered.

[0029] The manufacturing lead time (master) 305 is the product lead time of the relevant process for the relevant product, and may be a value set in advance based on, for example, past manufacturing results. The manufacturing lead time (corrected) 306 is the manufacturing lead time corrected based on the amount of stagnation, setup conditions, etc. The example in Figure 3 shows an example in which the manufacturing lead time is shortened due to conditions such as the continuous introduction of products of the same model, as will be described later.

[0030] The model unit process information 114 includes information that identifies the processes and their order required to manufacture each model product.

[0031] The setup conditions 115 include information indicating conditions for determining the setup time for each process of each type of product. For example, the setup conditions 115 may include information that associates a combination of a type, a process, and equipment with a setup time.

[0032] Furthermore, the setup time for a certain process of a certain product also differs depending on whether the model of the product introduced immediately before the product in the equipment where the work in that process is performed is the same as the model of the product in question. Generally, when the model of the product introduced immediately before the product in question is not the same as the model of the product in question, the setup time tends to be longer due to changes in parts assigned to the equipment, compared to when the model is the same. In other words, when products of the same model are introduced consecutively in the same process of the same equipment, the setup time is shorter than when they are not, and as a result, the manufacturing lead time is likely to be shorter. The setup conditions 115 in this embodiment include information indicating the setup time depending on whether products of the same model are introduced consecutively.

[0033] Next, the output information 108 will be described.

[0034] The stagnation information 121 for each process is information indicating, for example, the amount of stagnation in each process, and is generated based on the work progress 112.

[0035] The corrected scheduled completion date and buffer information 122 includes information on the scheduled completion date and buffer based on the manufacturing lead time corrected based on the amount of stagnation, setup conditions, and the like.

[0036] FIG. 4 is an explanatory diagram of the corrected scheduled completion date / buffer information 122 held by the production planning system 100 according to the embodiment of the present invention.

[0037] 4 is composed of information on a process 401, a model 402, a required deadline 403, a scheduled completion date 404, and a buffer 405. These correspond to the process 201, the model 202, the required deadline 203, the scheduled completion date 204, and the buffer 205 of the production plan 111 shown in FIG. 2, respectively. However, the scheduled completion date 404 and the buffer 405 hold values ​​obtained by correcting the values ​​of the scheduled completion date 204 and the buffer 205 based on the production LT (correction) 306.

[0038] Figure 4 shows the estimated completion date and buffer obtained by correcting the production plan shown in Figure 2 based on the corrected manufacturing lead times shown in Figure 3. In this example, the manufacturing lead time for process "1-1" of model "A" in the first row was shortened from "10 days" to "8 days," so the estimated completion date was brought forward from "November 29th" to "November 27th," and the buffer increased from "2 days" to "4 days." For the second row, the manufacturing lead time was shortened from "9 days" to "7 days," so the estimated completion date was brought forward from "November 30th" to "November 28th," and the buffer increased from "3 days" to "5 days." For the third row, the manufacturing lead time was shortened from "11 days" to "10 days," so the estimated completion date was brought forward from "November 29th" to "November 28th," and the buffer increased from "3 days" to "4 days."

[0039] The candidate operation plan 123 with zero work volume is a candidate operation plan generated by modifying the production line operation plan based on the corrected production plan so as to increase the number of days with zero work volume.

[0040] FIG. 5 is an explanatory diagram of operation plan candidates 123 for which the amount of work is zero, which are held by the production planning system 100 according to the embodiment of this invention.

[0041] The operation plan candidate 123 shown in FIG. 5, which results in zero workload, is composed of information on an entry date 501, a line 502, a process 503, equipment 504, workload 505, downtime 506, workers 507, overtime hours 508, and power consumption reduction 509. The entry date 501 indicates the date on which a product is entered into a process. The line 502 is information identifying the line into which the product is entered. The process 503 is information identifying the process. The equipment 504 is information identifying the equipment to which the process is assigned (i.e., the equipment on which the work of the process is performed).

[0042] Work volume 505 indicates the work volume of the process in question at the equipment. Downtime 506 indicates the downtime of the equipment on the relevant start date (i.e., the time when work for the process is not being performed at the equipment). Workers 507 indicates the number of workers assigned to work on the process in question at the equipment. Overtime hours 508 indicates the overtime hours worked by workers assigned to work on the process in question at the equipment. In the example of FIG. 5, the values ​​in the pre-change operation plan and the post-change operation plan are displayed for work volume 505, downtime 506, workers 507, and overtime hours 508.

[0043] The power consumption reduction 509 indicates the amount of power consumption reduced by changing the operation plan. This is an example of the effect of reducing the environmental load by changing the operation plan, and the amount of CO2 emissions reduction may be used instead of (or in addition to) the amount of power consumption reduced.

[0044] In the example of Figure 5, the values ​​in the operation plan before the change are based on the production plan corrected as shown in Figures 3 and 4. In contrast, the operation plan after the change has been changed so that the work on December 2nd (i.e., work for products to be input on December 2nd) is zeroed by allocating it to December 1st and December 3rd, which are the days before and after the change. As a result, the amount of work on December 2nd, which was "40" before the change, becomes "0" after the change. As a result, the downtime on December 2nd increases from "6 hours" to "12 hours," the number of workers decreases from "1 person" to "0 people," and overtime hours remain "0 hours." Furthermore, the power consumption after the change is reduced by "5 kWh" compared to the power consumption on December 2nd before the change.

[0045] On the other hand, because "20" of the workload before the change on December 1st (40) is allocated to December 1st, the workload on December 1st increases from "70" to "90", downtime decreases from "1 hour" to "0 hours", the number of assigned workers increases from "1 person" to "2 people", and overtime hours increase from "0 hours" to "1 hour". The power consumption on December 1st is not reduced by the change.

[0046] Furthermore, the remaining "20" of the "40" workload before the change on December 1st is allocated to December 3rd, so the workload on December 3rd increases from "50" to "70", the downtime decreases from "2 hours" to "0 hours", the number of assigned workers increases from "1 person" to "2 people", and overtime hours remain at "0 hours". The power consumption on December 3rd is not reduced by the change.

[0047] In practice, multiple operation plan candidates 123 with zero workload may be created. For example, the example in FIG. 5 shows one operation plan candidate in which the work on December 2, which had the least workload before the change, is allocated to the days before and after that date. This is expected to reduce power consumption and other costs by increasing the number of days with zero workload while minimizing the amount of change to the operation plan. However, this type of change proposal is just one example. For example, another candidate plan may be created in which the work on December 1 is allocated to December 2 and December 3 (or other days), or another candidate plan may be created in which the work on December 3 is allocated to December 1 and December 2 (or other days). Alternatively, a plan may be created in which overtime hours are further increased in exchange for increasing the number of workers, or a plan may be created in which overtime hours are further increased without increasing the number of workers.

[0048] In the above example, a candidate operation plan is created by modifying the operation plan so that the required deadline is met and the number of days on which the equipment is not operating is increased. This is an example of modifying an operation plan based on an index indicating a reduction in power consumption. That is, in the above example, an index based on the number of days on which the equipment is operating is used as an index indicating a reduction in power consumption, and the operation plan is modified to increase the number of days on which the equipment is not operating. In contrast, for example, an index based on the operating time of the equipment may be used as an index indicating a reduction in power consumption, and the operation plan may be modified to increase the time on which the equipment is not operating.

[0049] Alternatively, the index indicating a reduction in power consumption may include an index based on the number of times the equipment is started, and the operation plan may be changed so that the time the equipment is not operating is longer (or the number of days the equipment is not operating is longer) and the number of times the equipment is started is reduced. Since starting up equipment consumes more power than normal operation, the power consumption tends to be lower the fewer times the equipment is started up, even if the time the equipment is not operating is the same. For this reason, by using an index based on the number of times the equipment is started up, it becomes easier to create a candidate operation plan with fewer times the equipment is started up, even if the time the equipment is not operating is the same.

[0050] The operating facility information 124 is information indicating the operation schedule (for example, the operation start time and operation end time for each day) of each facility based on the created operation plan.

[0051] The input simulation result 125 is information indicating the result of simulating the work of each process when products are input based on the created operation plan proposal (i.e., input simulation). For example, the values ​​of downtime 506, workers 507, overtime hours 508, and power consumption reduction 509 included in the operation plan candidate 123 in which the workload is zero may be calculated by the input simulation.

[0052] The adjusted production plan 126 is information indicating a production plan adjusted based on the results of an input simulation, user input, etc. For example, the adjusted production plan 126 may be the information shown in Fig. 4 adjusted based on the results of an input simulation, user input, etc.

[0053] FIG. 6 is a flowchart of the process executed by the production planning system 100 according to the embodiment of the present invention.

[0054] First, the data acquisition unit 132 acquires the production plan 111, the work progress 112, and the setup conditions 115 (step S601). Next, the manufacturing lead time correction unit 133 corrects the manufacturing lead time based on the change in setup time based on the input variety (i.e., the type of product to be input) and on process stagnation information (step S602). As a result, for example, the manufacturing lead time (corrected) 306 shown in FIG. 3 is calculated.

[0055] Next, the operation plan creation unit 134 creates an operation plan for the equipment based on the corrected manufacturing lead time (step S603). As a result, work for each process of each product is assigned to equipment, and a plan for the operation time (e.g., operation start time and operation end time) of each equipment is created.

[0056] Next, the input date and personnel allocation adjustment unit 135 allocates the input job to other production dates based on the corrected manufacturing lead time so as to increase the number of days on which the amount of work is zero while adhering to the required deadline (step S604). As a result, multiple operation plan candidates are created, such as a plan to allocate the work on December 2 to December 1 and December 3 as shown in Figure 5.

[0057] Next, the input date and personnel allocation adjustment unit 135 confirms and modifies the non-operation plan (i.e., the operation plan including non-operation days on which the workload is zero) after the allocation of input jobs has been changed in step S604 (step S605). For example, the display control unit 136 may present one of the operation plan candidates to a user (e.g., the worker himself / herself or the worker's manager) via the input / output unit 101, and when the user inputs an instruction to modify the operation plan candidate, the display control unit 136 may modify the operation plan candidate in accordance with the instruction.

[0058] For example, if the user determines that the increase in workers required in a candidate operation plan cannot be realized in light of the manpower plan, the user may input instructions to modify the candidate operation plan so that the number of workers is not increased.

[0059] Next, if a correction is instructed, the start date and personnel allocation adjustment unit 135 creates a candidate operation plan that reflects the correction, and simulates the work of each process when the product is started based on the candidate operation plan (step S606). As a result, for example, the scheduled completion date and buffer for each process of each product are calculated. Then, the start date and personnel allocation adjustment unit 135 determines whether the scheduled completion date obtained as a result of the simulation meets the required deadline (step S607).

[0060] If the required deadline is not met, the process returns to step S605, and the processes from step S605 onwards are executed for another candidate operation plan. On the other hand, if the required deadline is met, a production plan is finalized based on the candidate operation plan (step S608). Here, the display control unit 136 may display the finalized production plan via the input / output unit 101.

[0061] FIG. 7 is an explanatory diagram of an output screen displayed by the production planning system 100 according to the embodiment of the present invention.

[0062] The output screen 700 shown in FIG. 7 includes an analysis period input area 701, a production plan display area 702, a stagnation amount display area 703, a work time fluctuation information display area 704, an operation plan candidate display area 705, an environmental load reduction effect display area 706, an edit button 707, and a confirm button 708.

[0063] For example, when the process shown in FIG. 6 is started, an output screen 700 is displayed, and when the user inputs the period for which an operation plan is to be created in an analysis period input area 701, the production plan for that period acquired from the production plan 111 is displayed in a production plan display area 702, and the current stagnation amount acquired from the work progress 112 may be displayed in a stagnation amount display area 703.

[0064] The working time variation information display area 704 displays the working time variation information 113 obtained as a result of step S602. Furthermore, the display contents of the production plan display area 702 may be updated based on the corrected manufacturing lead time. For example, the contents of the production plan display area 702 may be updated to resemble the corrected scheduled completion date / buffer information 122 shown in FIG. 4, or the scheduled completion date and buffer values ​​before and after the correction may be displayed together.

[0065] The operation plan candidate display area 705 displays the operation plan candidate selected by the user from among the multiple operation plan candidates obtained as a result of step S604. Additionally, the environmental load reduction effect display area 706 displays the environmental load reduction effect (e.g., the amount of power consumption reduction or the amount of CO2 emission reduction, etc.) of each operation plan candidate.

[0066] For example, in step S605, the user may select one of the operation plan candidates and modify the displayed operation plan candidate by operating the edit button 707. When the user finally operates the confirm button, the operation plan candidate selected by the user may be confirmed as the final operation plan.

[0067] The system according to the embodiment of the present invention may be configured as follows, for example.

[0068] (1) A production planning system (e.g., production planning system 100) comprising a calculation unit (e.g., calculation unit 103) and a memory unit (e.g., memory unit 102), wherein the memory unit holds production plan information (e.g., production plan 111), and the production plan information includes the model of each product to be produced (e.g., model 202), the required deadline for each process of each product (e.g., required deadline 203), and the planned completion time for each process of each product (e.g., planned completion date 204), and the calculation unit generates an operation plan for equipment performing each process of each product based on the production plan information so that the required deadline for each process of each product is met (e.g., step S603), and modifies the operation plan based on an index indicating the reduction in power consumption of the equipment so that the required deadline for each process of each product is met and a period during which the equipment is not operating is included (e.g., step S604).

[0069] This makes it possible to formulate a production plan that reduces environmental impacts such as power consumption while adhering to required deadlines, even in the case of multi-item mixed production.

[0070] (2) In the above (1), the index showing the reduction in the equipment's power consumption is an index based on the equipment's operating time, and the calculation unit changes the operation plan based on the index showing the reduction in the equipment's power consumption so that the required deadline for each process of each product is met and the time during which the equipment is not operating is extended.

[0071] This makes it possible to formulate a production plan that reduces environmental impacts such as power consumption while meeting required deadlines.

[0072] (3) In (2) above, the index showing the reduction in the equipment’s power consumption is an index based on the number of days the equipment is in operation, and the calculation unit changes the operation plan based on the index showing the reduction in the equipment’s power consumption so that the required deadlines for each process of each product are met and the number of days the equipment is not in operation is increased.

[0073] This makes it possible to formulate a production plan that reduces environmental impacts such as power consumption while meeting required deadlines.

[0074] (4) In (3) above, the calculation unit changes the operation plan based on the operation plan before the change so that the work of each process on the day with the shortest equipment operating time is moved to one or more other days.

[0075] This makes it possible to reduce power consumption while minimizing changes to the operation plan.

[0076] (5) In (4) above, the indicator indicating the reduction in the equipment's power consumption further includes an indicator based on the number of times the equipment is started up, and the calculation unit changes the operation plan based on the indicator indicating the reduction in the equipment's power consumption so that the required deadline for each process of each product is met, the number of days the equipment is not in operation is increased, and the number of times the equipment is started up is reduced.

[0077] This makes it possible to formulate a production plan that reduces environmental impacts such as power consumption while meeting required deadlines.

[0078] (6) In the above (1), the calculation unit generates a resource allocation plan that includes at least the allocation of workers (for example, worker 507) based on the changed operation plan.

[0079] This makes it easier to verify whether the operation plan is feasible.

[0080] (7) In (1) above, the memory unit further stores setup condition information (e.g., setup condition 115) indicating the setup time of the equipment for each condition, and work progress information (e.g., work progress 112) indicating the amount of stagnation in each process, and the calculation unit updates the expected completion time of each process of each product included in the production plan information based on the setup condition information and the work progress information (e.g., step S602), and changes the operation plan based on the updated production plan information so that the required deadline for each process of each product is met and a period during which the equipment is not operating is included.

[0081] This allows for accurate production planning that reduces the environmental impact of power consumption and the like.

[0082] (8) In (7) above, the setup condition information includes information indicating that the setup time is shorter when the same type of product is continuously fed into the equipment compared to when different types of products are fed into the equipment sequentially, and the calculation unit calculates the manufacturing lead time for each process of each product identified based on the production plan information and the setup condition information, and updates the expected completion date of each process of each product based on the calculated manufacturing lead time.

[0083] This allows for accurate production planning that reduces the environmental impact of power consumption and the like.

[0084] The present invention is not limited to the above-described embodiments and includes various modifications. For example, the above-described embodiments have been described in detail to provide a better understanding of the present invention, and the present invention is not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace part of the configuration of each embodiment with other configurations.

[0085] Furthermore, the above-described configurations, functions, processing units, processing means, etc. may be partially or entirely implemented in hardware, for example, by designing them as integrated circuits. The above-described configurations, functions, etc. may also be implemented in software, with a processor interpreting and executing a program that implements each function. Information such as the programs, tables, and files that implement each function can be stored in storage devices such as nonvolatile semiconductor memory, hard disk drives, and solid-state drives (SSDs), or in computer-readable, non-transitory data storage media such as IC cards, SD cards, and DVDs.

[0086] In addition, the control lines and information lines shown are those that are considered necessary for the explanation, and not all control lines and information lines in the product are necessarily shown. In reality, it can be considered that almost all components are interconnected. [Explanation of symbols]

[0087] 100 Production Planning System 101 Input / output section 102 Storage section 103 Arithmetic section 104 Network 105 Design System 106 Work instruction device 107 Input information 108 Output Information 130 Memory section 131 Processing unit

Claims

1. A production planning system, The system includes a calculation unit and a storage unit, The storage unit holds production plan information, The production plan information includes a model of each product to be produced, a required deadline for each process of each product, and a scheduled completion time for each process of each product, The calculation unit generating an operation plan for equipment that performs each of the processes for each of the products based on the production plan information so that the required deadline for each of the processes for each of the products is met; A production planning system characterized by modifying the operation plan based on an index based on the operation time of the equipment so that the required deadline for each process of each product is met and the time during which the equipment is not in operation is extended.

2. A production planning system, The system includes a calculation unit and a storage unit, The storage unit holds production plan information, The production plan information includes a model of each product to be produced, a required deadline for each process of each product, and a scheduled completion time for each process of each product, The calculation unit generating an operation plan for equipment that performs each of the processes for each of the products based on the production plan information so that the required deadline for each of the processes for each of the products is met; A production planning system characterized by modifying the operation plan based on an index based on the number of days the equipment operates so that the required deadlines for each process of each product are met and the number of days the equipment is not in operation is increased.

3. A production planning system according to claim 2, The calculation unit changes the operation plan based on the operation plan before the change so as to move work for each process on the day when the equipment has the shortest operating time to one or more other days.

4. A production planning system according to claim 3, The calculation unit changes the operation plan based on an index based on the number of days the equipment is in operation and an index based on the number of times the equipment is started up, so that the required deadline for each process of each product is met, the number of days the equipment is not in operation increases, and the number of times the equipment is started up decreases.

5. A production planning system according to claim 1 or 2, The production planning system is characterized in that the calculation unit generates a resource allocation plan including at least worker allocation based on the changed operation plan.

6. A production planning system according to claim 1 or 2, the storage unit further stores setup condition information indicating a setup time of the equipment for each condition, and work progress information indicating a stagnation amount of each process; The calculation unit updating the scheduled completion dates of the respective processes of the respective products included in the production plan information based on the setup condition information and the work progress information; A production planning system characterized by modifying the operation plan based on the updated production plan information so that the required deadlines for each process of each product are met and so that a period during which the equipment is not operating is included.

7. A production planning system according to claim 6, the setup condition information includes information indicating that a setup time is shorter when products of the same model are continuously input into the equipment than when products of different models are sequentially input into the equipment, The calculation unit calculating a manufacturing lead time for each process of each product specified based on the production plan information and the setup condition information; A production planning system characterized in that the estimated completion dates of each of the processes for each of the products are updated based on the calculated manufacturing lead times.

8. A production planning method executed by a production planning system, comprising: The production planning system includes a calculation unit and a storage unit, The storage unit holds production plan information, The production plan information includes a model of each product to be produced, a required deadline for each process of each product, and a scheduled completion time for each process of each product, The production planning method includes: a step in which the calculation unit generates an operation plan for equipment that performs each of the processes for each of the products based on the production plan information so that the required deadline for each of the processes for each of the products is met; and a procedure in which the calculation unit changes the operation plan based on an index based on the operation time of the equipment so that the required deadline of each process of each product is met and the time during which the equipment is not in operation is extended.

9. A production planning method executed by a production planning system, comprising: The production planning system includes a calculation unit and a storage unit, The storage unit holds production plan information, The production plan information includes a model of each product to be produced, a required deadline for each process of each product, and a scheduled completion time for each process of each product, The production planning method includes: a step in which the calculation unit generates an operation plan for equipment that performs each of the processes for each of the products based on the production plan information so that the required deadline for each of the processes for each of the products is met; and a procedure in which the calculation unit changes the operation plan based on an index based on the number of days the equipment is in operation so that the required deadline for each process of each product is met and the number of days the equipment is not in operation increases.

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